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|Authors:||SANE, Miss. SHRADHA CHANDRAMOHAN|
|Title:||HETEROSIS AND COMBINING ABILITY STUDIES IN BRINJAL (Solatium melongena Linn.)|
|Publisher:||MAHATMA PHULE KRISHI VIDYAPEETH, RAHURI-413 722, DIST. AHMEDNAGAR MAHARASHTRA STATE (INDIA)|
|Abstract:||The present investigation entitled, "Heterosis and combining ability studies in brinjal (Solanum melongena Linn.)" was undertaken with the objectives of elucidating information on the extent of heterosis, general and specific combining ability effects, gene action and heritability in brinjal. Eight parents were utilized in diallel mating system, the resulting 28 hybrids along with parents were evaluated during kharif season of 2006. The data was recorded for different qualitative and quantitative characters. The mean performance of the hybrids was superior than the mean performance of the parents for most of the characters viz., plant height, spread of plant, days to 50% flowering, polar and equatorial diameter of fruit, fruit size index, total yield and number of fruits per plant, yield (q/ha) and duration of harvesting. Considering the mean performance of the hybrids the cross 6 x 8 (Krishna Kathi x PLK-1) was found to be superior for characters like spread of plant, total yield of fruits (kg/plant) and yield (q/ha). Significant and positive heterosis was observed for most of the characters. The percentage of heterotic crosses showing heterosis over better parent were total number of fruits/plant (67.62), total yield of fruits (54.68), yield (q/ha) (54.68), fruit size index (32.28), number of primary branches (31.78), equatorial diameter of fruit (24.57), plant height (21.17), polar diameter of fruit (14.43), spread of plant (E-W) (4.78), spread of plant (N-S) (11.22), duration of harvesting (3.16), days to first harvest (-9.69) and days to 50 per cent flowering (-8.70). High heterosis was observed in the cross 6 x 8 (Krishna Kathi x PLK-1) for total yield of fruits (kg/plant) and yield (q/ha) and in the cross 3 x 4 (RHRB-7-7-6-1 x IAB-87) for characters like plant height and total number of fruits per plant. The best general combiners among the parents were the parents P2 (MF), P8 (PLK-1) followed by P5 (JB-19). In case of specific combining ability of hybrids, the best crosses were 3 x 4 (RHRB-7-7-6-1 x IAB-67) and 6 x 8 (Krishna Kathi x PLK-1) for most of the economic characters. The non-additive gene components were observed to be predominant for all the characters and none of the characters showed high estimates of heritability. Thus, considering the mean performance, heterosis and sca effects, the best hybrids were 6 x 8 (Krishna Kathi x PLK-1) and 3 x 4 (RHRB-7-7-6-1 x IAB-87). Also the crosses 1 x 4 (JB-1 x IAB-87), 5 x 8 (JB-19 x PLK-1) and 5 x 6 (JB-19 x Krishna Kathi) deserved due consideration for their further exploitation as commercial hybrids.|
|Appears in Collections:||Thesis|
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